﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System.Collections.Generic;
using System.Windows.Controls;
using System.Diagnostics;

namespace Xceed.Silverlight.DataGrid
{
  internal class ScrollLayoutFactory : LayoutFactoryBase
  {
    public ScrollLayoutFactory( bool scrollForward, Orientation orientation )
    {
      m_scrollForward = scrollForward;
      m_orientation = orientation;
    }

    public override ILayout CreateLayout( ILayoutContainer container, IEnumerable<ILayoutElement> elements )
    {

      if( container.Layout is LinearLayout )
      {
        ILayout layout = container.Layout;

        if( layout is ITransitionLayout )
        {
          layout = ( ( ITransitionLayout )layout ).NewLayout;
        }

        Debug.Assert( layout is LinearLayout );

        MergeInfo mergeInfo = new MergeInfo( layout.Elements, elements, m_scrollForward );

        return new ScrollingLayout( container, m_orientation, mergeInfo );
      }

      return new LinearLayout( container, elements, m_orientation );
    }

    private bool m_scrollForward;
    private Orientation m_orientation;
  }
}
